Clock projects that add alarm-setting features and buttons, which take careful design.
| Part (price) | Role |
| Raspberry Pi Pico ($4) | Microcontroller |
| SSD1306 128×64 OLED | Display |
| 830-Point Breadboard ($1.10) | Breadboard |
| Micro-USB Data Cable ($2.50) | Power and programming cable |
Microcontroller listed first. Prices shown only where known; see the source book for quantities, wiring, and current prices.